Charles hall



(No Model.) Sweets-Sheet 1.

G. HALL & J. YOUNG.

BOLT MACHINE.

Patented Apr. 20, 1886.

u minus HwlmLiibomplur, Wilhillglbll. u c

(No Model.) 3 Sheets-Sheet 2.

0. HALL & J YOUNG.

BOLT MACHINE.

No. 340,306. Patented Apr. 20, 1886.

N PETERS. Phololithagrlphcr. Wnhmgiun. D. Cv

3 Sheets-Sheet 3.

(No Mqdel.)

c. HALL & J. YOUNG;

BOLT MACHINE.

No. 340,306. Patented Apr. 20, 1886.

N. FEVERS. Phalo-Ulhognpiur, Wahinglon. D. C.

NITED STATES PATENT Fries.

CHARLES HALL, OF NEW YORK, N. Y., AND JOHN YOUNG, OF NE\VARK,'

NEW JERSEY, ASSIGNORS TO SAID CHARLES HALL.

BOLT-MACH|NE.

SPECIFICATION forming part of Letters Patent No. 340,306, dated April20, 1886.

Application filed Decembcrll, 1885. Serial No. 185,336. (No model.)

To aZZ whom it may concern:

Be it known that we, CHARLES HALL, of the city, county, and State of NewYork, and JOHN YOUNG, of Newark, in the county of Essex and State of NewJersey, have invented an Improvement in' Bolt-Machines, of which thefollowing is a specification.

This invention is especially applicable to bolt-machines of thecharacter represented in Letters Patent No. 317 ,642, granted to us May12, 1885, and we have described the said invent-ion with specialreference to the said machine, but we do not limit our invention to thismachine, as the present improvements are available with any bolt-machinein which there are dies that open and close to grasp the bolt-rod and toforge up the head of the bolt by a lateral pressure in addition to theupsetting action of a plunger. I

In a machine for making carriage-bolts jaws have been employed forholding the bolt while the conical head and squared shank are forgedupon the same, and automatic mechanism has been used for partiallyrevolving thebolt when the graspingjaws are open. In our machine thebolt-head is polygonal and the sides of the head are forged by the diesas the jaws are closed to grasp the bolt previous to the plungerstriking the top of the head. lVe have discovered that in addition tothe automatic turning of the bolt as the polygonal head is forged, it isnecessary to give an endwise motion to the bolt to insure a properforging action and to supply the metal necessary to make a perfect head.

In bolt-machines of the character to which ourimprovements relate, thetools that hold the heated'rod and form the sides of the head aregrooved for the rod itself and made with shoulders and sides at theforward ends, between which the head is forged up. \Vhen theheated blankis placed between these tools, the end projects and a plunger is broughtup powerfully to upset the metal and spread it between the shoulders ofthe tools. Usually the metal spreads in the direction of the opening inthe tools wider than the head; hence such tools as they close the nexttime compress the sides of the head, because the bolt between the blowshas received either a quarter or a sixth of a revolution. This manner offorging bolts with grees for eightsided, six-sided, and four-sidedheads. The holding-dies then close and press upon the sides of the head,to forge up the same, and at the same time hold the bolt, and then theplunger strikes a second blow, &c.

By this improvement we are enabled to effeet the forging of the headwith greater accuracy, and we avoid the risk of injury to the bolt bythe lack of skill in the workman who feeds in the bolt-rod.

In the drawings, Figure 1 is a plan view of our improvement and so muchof the machine shown in the said Patent No. 317,642 as is necessary tounderstand the connection of the improvement with the same. Fig. 2 is anend view of the improved mechanism for rotating the bolt, the framebeing shown as broken open and the holding-dies removed, but theirpositions indicated by dotted lines; Fig. 3, an elevation, Fig. 4 a planView, and

Fig. 5 an end view, of the arm and adjustable crank-pin for varying theextent of motion given to the fingers that revolve the bolt-rod. Fig. 6illustrates a modification in the devices for rotating the bolt-rod.Fig. 7 is adiagram of a modification of the rotating mechanism, and Fig.8 shows a square-headed bolt as forged by this machine.

The holding-jaws G H and the upset-ting plunger 0 are similar to thoseshown in our aforesaid patent, and the plunger 0 receives its motionfrom a cam, of any desired charac- 5 ter, upon the shaft D. Upon theshaft D is a cam, D,with projecting inclined segmental ribs 2 and 3,that are properly shaped to give motion to the parts, as hereinafterdescribed. Upon the frame A is a stock, 13, through which passes atubular shaft, I). and within this is a shaft,a.' Upon one end of theshaft a is an arm, a, that projects so that its end rests against thecam-surface 2, and upon the tubular shaft 1) is an arm, I), whichengages the cam-surface 3. At the other end of the shaft a is acrank-arm, a*, which is connected by a link, a, to a crank-arm, d, on atubular shaft, d, that is supported in a bearing, d", screwed to theframe of the machine. Vithin this tubular shaft (1 is a shaft, 6, oneend of which is made with a screw-thread, within the stationary bearing0 that is screwed to I116 frame. Upon this shaft 6 is a cross-head, f,to which are hinged the fingers g that extend upwardly at the back endsof the holding-jaws G H" between said jaws and the frame of the machine.The finger 9 extends below the cross-head f and hinge 4 and terminatespreferably with a roller, 5, and there is a spring, 71, at one side ofthis roller, and said spring extends downwardly and is fastened to theframe of the machine. This spring, acting on the roller 5, tends topress the finger g upon the bolt-rod I and hold the same between thefingers g g. It will nowbe evident that if the shaft 0 is partiallyrotated the finger y will be moved up by the cross-head f, and at thesame time the finger y will be moved down and the bolt-rod I will bepartly rotated. I 1)I'O"ld6 for varying the extent of motion given tothe shaft 6, as he 'reinafter described, so that the fingers g y will bemoved a proper distance, according to the size of the bolt made use of,and according to the number of degrees of rotation to be given to thebolt-rod in making four, six, or eght sided heads, and I arrangemechanism for relieving the pressure cf the spring it upon the roller 5,in order that the pressure of the fingers upon the bolt-rod may belessened or removed when the shaft e or crosshead fare moved in theother direction.

There is a crank-arm, (1, upon the tubular shaft d, adjacent to theroller 5, and the spring h is wide enough for this crank-arm d to pressagainst the same and relieve the roller 5 from the pressure of thespring h, and the sizes and proportions of the parts are such that thecam 2, acting upon the arm 1, turns the same and the shaft 0., and, bythe crank a and link a, moves the crank-arm d, tubular shaft d,'and arm01", to relieve the pressure of the spring h upon the roller 5 at thetime the clamping-jaws G H are holding the bolt-rod I, and at this sametime the cam 3 acts upon the arm h and intermediate mechanism topartially rotate the shaft 6 and cross-head f, to move the fingers g gat the sides of the bolt-rod I without turning the same.

In the connections between the tubular shaft 1) and the shaft 6, Iprovide means for adjusting the extent of mot-ion that the cam 3 givesto the fingers g g, and with this object in view I connect to the backend of the shaft 0 a crank, k, and a connecting-rod, k, to a crankpin,Z, that is provided with a base that slides in the ways Z" upon acrank-arm, L, that is connected to the tubular shaft 1). There is ascrew, Z, passing through a flange'upon the crank L and through the baseof the crankpin Z. By rotating this screw l the crank-pin l is adjustedso as to he nearer to or farther from the shaft 1), and hence more orless motion will be given by the crank L and conmeeting-rod k to thecrank it and shaft e. It is preferable to mark upon the ways 2 divisionsto be made use of in setting the crankpin Z, the divisions on one of theways being adapted to six-sided bolt-heads and those on the other waysbeing adapted to four and eight sided bolt-heads. These divisions shouldbe marked so as to indicate the size of boltrod, as illustrated in Fig.3, so that when the index upon the base of the crank-pin Z is moved tothe division indicated the parts will be set to a rod of the sizedenoted, and the motion will be forty-five degrees, sixty degrees, orninety degrees, according to which scale is made use of upon the ways V.

The spring R is between an arm that extends from the crank L and theframe of the machine. It tends to keep the cam-arm a toward and againstthe cam 2, and to partially rotate the shaft 0 in the opposite directionto the movement given by the earn 2.

As the jaw IF opens, it is necessary that the bolt-rod be moved slightlyaway from the semicircular recess in the holding-die thatis within thejaw G, in order that it may be free to turn. To effect this I make useof a hook, a, hinged to the finger g, and there is a latchpiece, it,upon the jaw H, so that as the jaw H opens the latch-piece n, actingupon the hook it, draws the fingers g 9 out of the recess in the jaw G.to move the bolt-rod I. At this moment the shaft e and cross-head f arepartly rotated and the finger 9 carried up and the finger 9 broughtdown, and the bolt-rod I receives its partial rotation.

As before mentioned, there is a screw't-hread,

, 0, near one end of the shaft e,wi.thin the bearing 6, and thedirection of rotation and the angle of the screw-thread are such thatwhen the shaft 6 receives the partial rotation aforesaid in rotating thebolt-rod, the shaft 6, and fingers g g, and boltrod I are moved. by theaction of the screw-thread, to carry the heads of the bolt toward theupsetting-die O'a sutfi cient distance to clear the bolt-head from theportions of the jaws G H", that form the shoulders at the under side ofthe bolt-head, and thereby supply sufficient of the bolt-rod to fill outand make perfect the head of the bolt.

The dies, adapted to grasp the bolt-rod and to form the head, usuallycalled the tools, that are placed in the holding-jaws GH, are removable,so as to be adapted to the grasping of bolts of different sizes. It isto be understood that the head of the bolt is formed between the offsetsin the tools within the jaws G II by the pressure of the plunger 0, asusual in bolt-machines. I place upon the jaw G a block with a screw, 0',passing through it and acting against the back of the finger g, in orderthat the face ofsaid finger may occupy IIO its

the proper position adjacent to the bolt-rod I ferent sizes, for when abolt-rod of alarge size when grasped by the tools in the jaws GHh I makeuse of a contractile helical spring,r, between the under part of thehook at and the jaw g, which spring tends to open the jaws g g for theinsertion of the bolt-rod I, when the pressure of the spring it upon theroller 5 is taken off, and at the same time this spring r draws down thehook it toward the latch a.'

It is necessary to provide means for throwing out of action the fingersg y by the workman in cases where the bolt-rod is to remain withoutbeing rotated for one or more blows upon the head and for allowing forthe entrance of the heated rod or for removing the headed blank. Toeffect this obj ect,I make use of a bell-crank lever pivoted at S, onearm,S, of which passes up near to the spring It, so that by it thespring It may be pushed back out of action. The other arm, S, of thislever is hinged to aslide, 8, the upper end of which slide is guided bya loop upon the side of the arm carrying the jaw H and the upper end isadjacent to the hook a. This lever S S is controlled by a treadle of anysuitable character, so that the workman by depressing the treadle withhis foot raises the arm S and slide-bar S, lifting the hook at out ofthe Way of the latch n, and at the same time moving the arm S of thebent lever and pressing back the spring h from the roller 5, thusallowing the spring r to open the fingers and hold them out of the wayof the bolt-rod.

In Fig. 6 we have illustrated a progressive rotary device for moving thebolt-rod,the rollers g g acting in place of the fingers in rotating thebolt-rod, and to these rollers a progressive movement is communicated bya wheel and ratchet and paw]; but we prefer the devices shown in Figs.land 2, because we are able to give to the bolt-rod anend movementsimultaneously with the rotary movement.

In Fig. 6 thearm A has an eye that is loose upon the shaft A and thisarm A is provided with a stud, to which a spring,B,is connected at oneend, the other end of the said spring being attached to a portion of theswinging jaw H so that as the said jaw H opens the arm .A will be swungupon the shaft A until it is arrested by the screw-stop B Upon this armA is a projection and stud carrying the roller g, and there is agearwheel, K upon' the shaft A gearing into a wheel, K", upon the stud 1which wheel K gears into pinions adjacent to and connected with therespective wheels 9 g. The wheel 9 is upon a leverarm, L having the studP as its pivot, and the spring L tends to press the roller 9 away fromthe roller 9 when unacted upon by the treadle and connection, and thereis asmall wheel, N upon an arm, N, pivoted at N to the arm A*. Upon thiswheel N the bolt-rod I rests, and it is also between the wheels 9 9.There is a movable pin at 0 passing through holes in the arms A* and N,the object of this wheel N and adjustment being to adapt the apparatusto bolt-rods of difis being operated upon the wheel N and its arm 1. islowered and the pin 0 inserted in its appropriate holes. \Vhen theapparatus .is to be used with a small bolt-rod, the pin 0 is withdrawn,and the wheel N and arm N" raised to the proper point, and the pinreinserted in its appropriate holes, so that the axis of the bolt-rodmay always occupy the proper position.

Upon the shaft A is an arm, 1 with a roller, 1?, at the end, that passesin between the stationary bracket 1? and the cylindrical flange P uponthe wheel K and there is an adjusting screw, Q, passing through a lug onthe arm A and acting against a toe upon the arm P The operation of theseparts is as follows: As the jaw H is opened, the spring B swings the armA upon the shaft A and at this moment the roller P,wedging in betweenthe bracket 1 and the cylindrical flange P of the wheel K holds saidwheel K stationary, and the wheel K is partly rotated by being carriedwith the arm A*, and in so doing the wheels 9 g are rotated and turn thebolt-rod I and the extent of this turning motion is regulated by thestop-screw B". As the aw H closes,'the whole of the parts swing upon theshaft A, the wheel K and its cylindrical flange 1 moving with the otherparts, and the weight of the arm P causes the roller P to remain incontact with the bracket P un til the screw Q acts to lift the arm P andits roller 1?, when the end of said screw comes into contact with thetoe of the arm A.

In machines that have heretofore been made for forging carriage-boltsthe head is circular, and in come machines of this character de viceshave been proposed for turning theboltrod. Our present improvements areto be distinguished from this class of machines, be cause in our machinethe dies are made with recesses for the bolt-rod, in which said rod isgrasped when the dies are closed, and there are offsets with fiatsurfaces that forge up the edges of the bolt-head, and the bolt-head 1snot,formed within a recess, but by compression laterally by the flatsurfaces of the dies, as well as by the spreading act-ion of theplunger, and the number of sides formed upon the polygonal head dependsupon the number of degrees in the rotary movement given to the bolt rodby the automatic mechanism, so that the bolt-head is forged accuratelywith either four, six, or eight sides. This feature is not found in theautomatic feeding-machines heretofore made.

WVe claim as our invention- 1. The combination, with jaws for holdingthe bolt-rod I and for forging the sides of the bolt-head, of automaticmechanism, substantially as specified, for giving to the bolt a par;tial rotation, while the holding and forging jaws are opened,substantially as set forth.

2. The combination, with the holding-jaws, dies for forging up the sidesof the bolt-head,

and plunger for pressing upon the bolt-head, of fingers at oppositesides of the bolt-rod, springs for pressing the fingers toward eachother, and mechanism, substantially as specified, for moving the fingersand partially rotating the bolt at the time the holding-jaws are opened,substantially as specified.

3. The combination, with dies for holding the bolt-rod and for forgingthe head, of fingers gg, one at each side of the bolt-rod, crossheadf,to which the fingers are attached, the shaft 6, and mechanism,substantially as specified, for giving to the same a partial rotarymovement, as set forth.

4. The combination, with the holding and forging dies in a bolt-machine,of the fingers g g, cross-headf, shaft e, having a screw near oneend,and mechanism, substantially asspecified, for giving to the saidshaft e a partial rotary movement to turn the bolt-rod and to move itendwise, substantially as specified.

5. The combination, with the holding and forging dies in abOll3-lllIC11lllG, of the fingers g g, cross-headf, to which they arepivoted, shaft 6, and spring 72, that acts to press the fingers upon thebolt'rod, and mechanism, substantially as specified, for partiallyrotating the shaft 6.

6. The combination, with the holding and forging dies in abolt-machine,of the fingers g g, a spring to cause the pressure of the fingers uponthe bolt-rod, a treadle, and connections for throwing out of actionthesaid spring, and mechanism, substantially as specified, for movingthe fingers in opposite directions, substantially as set forth.

7. The combination, with the holding and forging dies in a'bolt-machine, of the fingers g g, the crosshead f, shaft 6, a cam andshaft for giving motion to the shaft 0, connectingrod, and adjustablecrank and pin for varying the extent of motion given to the fingers,substantially as set forth.

8. The combination, with the fingers g, cross-head f, and shaft 0, ofthe spring h, to press one finger toward the other, the tubular shaft(1, and crank-arm d acting upon the spring h, and mechanism,substantially as speci fied, for giving motion to the respective partsto rotate the bolt-rod and then to relieve the pressure of the fingersupon the same during the return movement, substantially as set forth.

9. The combination, with the holding and forging dies in abolt-n1achine, of the fingersg g, the crosshead f, and shaft 0, thehooka,a11d

latch n, the spring 7:, tubular shaft d, and crank-arm d, and mechanismfor giving motion to the respective parts, substantially as and for thepurposes set forth.

10. The combination, with the holding and forging dies, of the cam D,shaft a, tubular shaft 1), arms at the ends of the respective shafts,shaft 0, tubular shaft d, and the crank-arms and connecting-rods, thecross-head f, fingers g, the spring h, to close the fingers, and arm d,for pressing back the spring, the hook n,and the spring 1", for openingthe fingers, and the latch n upon the holdingjaw H, substantially as setforth.

11. The combination, with the'holding and forging dies, of the fingers gg and the mechanism, substantially as specified, for moving the same,the spring h, for pressing the fingers upon the bolt-rod, the treadleand lever for pressing back the spring, the hook a, latch n, and springr, substantially as set forth.

12. The combination, with the holding and forging dies, of fingers forgiving a partial rotation to the bolt-rod, the connections, and acrank-pin and a crank-arm in which the pin is adjustable by a screw andmechanism for moving the crank andits pin,whereby the extent of motiongiven to the bolt-rod is varied by adjusting the crank-pin,substantially as specified.

13. The dies eontainin g recesses for gripping the bolt-rod and flatsurfaces for forging up the sides of the head, and a plunger forapplying pressure endwise of the rod or bolt, in combination-withfingers acting in opposite directions and at opposite sides of thebolt-rod to give to such rod a partial rotation between each stroke ofthe jaws that forge the polygonal head, substantially as specified.

14. The dies containing recesses for gripping the bolt-rod and fiatsurfaces for forging up the sides of the head, and a plunger for applying pressure endwise of the rod or bolt, in combination with automaticmechanism acting at opposite sides of the bolt-rod for giving to suchrod a partial rotation between each stroke of the jaws and forging thepolygonal head, sub stantially as set, forth.

Signed by us this 4th day ofDecemher, 1885.

CHAS. HALL.

JOHN YOUNG.

Vi t nesses: G130. T. PINCKNEY, \VILLIAM G. Mom". 1

